51005561105005 has 16 divisors (see below), whose sum is σ = 65915028434304. Its totient is φ = 37665559713600.

The previous prime is 51005561104987. The next prime is 51005561105027. The reversal of 51005561105005 is 50050116550015.

It is not a de Polignac number, because 51005561105005 - 2⁹ = 51005561104493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51965602 + ... + 52938028.

It is an arithmetic number, because the mean of its divisors is an integer number (4119689277144).

Almost surely, 2^{51005561105005} is an apocalyptic number.

It is an amenable number.

51005561105005 is a deficient number, since it is larger than the sum of its proper divisors (14909467329299).

51005561105005 is a wasteful number, since it uses less digits than its factorization.

51005561105005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779396.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 51005561105005 in words is "fifty-one trillion, five billion, five hundred sixty-one million, one hundred five thousand, five".